Mémoire de bachelor : Haute Ecole de Gestion & Tourisme, 2021.
|
Thèse de doctorat : Université de Neuchâtel, 2019.
Today, the lowest phase noise microwave signals are generated optically by frequency division of an ultra-stable optical reference using a femtosecond frequency comb. In the commonly used approach, the ultra-stable optical reference is obtained by frequency-stabilizing a laser to a high-finesse ultra-low expansion optical cavity, and the frequency division is performed by optically locking a...
|
Thèse de doctorat : Université de Neuchâtel, 2019.
Lasers have revolutionized the way we live and work in so many ways and have become a major part of our lives. We use them in telecommunications, medical care, material processing, data storage and printing, just to name a few. Lasers have proved to be important tools and are a major subject of research in science, continuously developed further and finding new uses. Pushed by the need to...
|
Thèse de doctorat : Université de Neuchâtel, 2019.
Ultrafast laser systems find application as versatile tool in industry and science. Ultrafast laser systems based on Ti:sapphire – the workhorse in ultrafast science – operate typically at kHz repetition rates and benefit from the available broad gain bandwidth for the direct generation of sub 100-fs pulse durations. However, thermal effects in the gain medium due to a high quantum defect...
|
Thèse de doctorat : Université de Neuchâtel, 2019.
This thesis concerns the development, study, and optimisation of compact and high-performance frequency references based on rubidium (Rb) vapour cells1. More specially, two Rb vapour-cell frequency references are studied: an optical-frequency reference at 1.5 μm and a double-resonance pulsed optically pumped (POP) atomic clock. The use of vapour cells allows compact frequency...
|
In: Applied Physics B, 2014, vol. 115, no. 3, p. 311-324
|
Thèse de doctorat : Université de Neuchâtel, 2018.
This thesis studies the first self-referenced frequency combs based on modelocked semiconductor disk lasers (SDLs). The generation of stabilized frequency combs based on ultrafast lasers has been a significant breakthrough for many applications in various fields of physics, spectroscopy and metrology. Optical frequency combs can serve as a frequency ruler that provides a direct and...
|
Thèse de doctorat : Université de Neuchâtel, 2008.
The invention of the laser source in 1960 has led to a wide range of applications showing a widespread impact in every aspect of our today life, including for example hospital, factory or simply at home. In particular, recent developments originating from the compact, highly efficient and common semiconductor lasers that are simply supplied by an electrical current. The diode coherent light...
|
Thèse de doctorat : Université de Neuchâtel, 2018.
Various application fields in industry, telecommunication, navigation and space demand reliable, compact, high-performance frequency standards with a stability level of −14 at 105s (equivalent to <1ns/day). Thanks to semiconductor technology, optical pumping technique with a laser has opened up new schemes based on laser-microwave double-resonance (DR), such as...
|
In: Applied Physics B, 2006, vol. 85, no. 2-3, p. 349-354
|